Moreover, evidence of T cell activation, as indicated by generation of effector (CD45RA-CD62L-) and central memory (CD45RA− CD62L+) αβCD4conv and CD8+ cells was reported among COVID-19 patients with mild or severe disease, suggesting that activation of T cells is inversely associated with severity of SARS-CoV-2 infection11. The gene discussed is SELL; the disease is COVID-19.